Mohamed Salah posted a message of support to his Liverpool teammate, Loris Karius, on social media, urging the guardian to "ignore those who hate".
The Red Devils' 3-1 defeat against Borussia Dortmund in Charlotte on Sunday saw the Bundesliga side scoring its last goal when Karius was able to ward off a shot by Christian Pulisic before Jacob Bruun Larsen does not knock.
Two goals from Real Madrid when Liverpool was beaten 3-1 in the Champions League final in May, after which it was revealed that the 25-year-old German was suffering from concussion.
Stay strong Karius, it has arrived at the best of the players. Ignore those who hate. @LorisKarius
He also knocked over a free kick, allowing the hosts to score, in the Liverpool friendly against Tranmere at Prenton Park more early this month
After the match against Dortmund, striker Salah wrote on Twitter: "Stay strong Karius, it has come to the best of the players.On ignore those who hate @ LorisKarius." [19659002] Karius himself had posted a message via an Instagram story after the match that said: "For those who enjoy seeing others fail or suffer, I feel for you." Everything that happens in your life to contain so much anger and hatred, I pray that this will happen and that good things come to you. "